It is believed the A-League soccer game was identified as worthy of investigation by international match-fixing experts after the betting plunge. The amount of money held was a massive spike on normal betting trends.

European Union law enforcement agency Europol this week revealed nearly 700 games around the world were suspected of being fixed.

It is believed Europol investigators have been briefed on the A-League betting plunge. The game is believed to have drawn more gambling interest in Hong Kong than a major British Premier League game held the same weekend.

Match-fixing experts look for unusual betting patterns coupled with high scoring to identify soccer games that could have been manipulated.

Fairfax Media has chosen not to reveal the game for legal reasons.

If the Australian Crime Commission decided to investigate the game it could call players and officials to secret hearings and demand financial records of anyone.

All the major sporting bodies at Thursday's public release of findings from the commission's probe into Australian sport have promised to improve their integrity units.

On Thursday, Fairfax Media reported exclusively on police concerns that many codes are ill prepared for attempts to infiltrate sport. Police believe match fixers may be grooming sports stars to cheat, players are at risk of blackmail after buying drugs from crime gangs and overseas players may have come to Australia with pre-existing ties to corrupt betting rings.